LABC vs Self-Certification vs Competent Person Scheme: Building Control Routes Explained

Summary

Every piece of notifiable building work in England and Wales needs to be signed off as compliant with the Building Regulations 2010, but there isn't one single body that does this. There are three distinct routes, and which one applies depends on the type of work, not the size of the project. Structural, extension, loft conversion, and general building work goes through Building Control — either the local council's own team (LABC) or a private-sector Registered Building Control Approver (RBCA). Specific, well-defined trade work — gas appliances, notifiable electrical work, replacement windows, solid fuel stoves, oil heating — can instead be self-certified by a tradesperson registered with the relevant Competent Person Scheme, bypassing a separate Building Control application entirely for that element.

The confusion tradespeople and homeowners run into is usually one of two things: either assuming Building Control and Competent Person self-certification are alternatives for the same piece of work (they're not — CPS only applies to the specific trades it covers), or not realising that within one project, different elements can and often should be signed off through different routes simultaneously. A loft conversion needs Building Control for the structural work (new floor, staircase, fire escape provisions) and, separately, Part P self-certification from the electrician for the new lighting circuit and NICEIC-registered wiring — two certificates, two routes, one project.

The other significant recent change is the restructuring of the private Building Control sector. What used to be called "Approved Inspectors" no longer exists under that name — the Building Safety Act 2022 replaced the role with Registered Building Control Approvers (RBCAs), operating under new competency and oversight rules from the Building Safety Regulator (BSR). All firms had to complete registration by 6 April 2024 (extended to 6 July 2024 after industry representations), and any that didn't could no longer legally carry out Building Control work. For most domestic tradespeople this doesn't change the day-to-day choice much — it's still "council or private firm" — but the names, the regulator, and the competency requirements behind them have changed.

Key Facts

• Building Act 1984, Section 11A — the legal basis allowing the Secretary of State to authorise Competent Person Schemes so registered members can self-certify compliance with Building Regulations.
• Building Regulations 2010, Regulation 20 — sets out the self-certification mechanism used by CPS members.
• Building Safety Act 2022 — restructured private Building Control: Approved Inspectors became Registered Building Control Approvers (RBCAs), and individual inspectors became Registered Building Inspectors (RBIs) subject to new competency assessment.
• Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (SI 2024/110, in force 6 April 2024) — the operational framework for RBCAs, replacing the Building (Approved Inspectors etc.) Regulations 2010.
• Registration deadline — all Approved Inspector firms had to register as RBCAs by 6 April 2024, extended by 13 weeks to 6 July 2024 for those with applications in progress; unregistered firms cannot legally carry out Building Control work.
• Building Safety Regulator (BSR) — the body (hosted within HSE) responsible for the RBCA/RBI registration regime and for direct oversight of Higher-Risk Buildings (HRBs).
• Higher-Risk Buildings (HRBs) — residential buildings 18m+ or 7+ storeys — can only be overseen by the BSR directly; neither LABC nor a private RBCA can take on HRB Building Control work. Rarely relevant to domestic tradespeople.
• Only LABC can issue a Regularisation Certificate — retrospective approval for work carried out without Building Control at the time; RBCAs cannot regularise unauthorised historic work.
• Building Notice vs Full Plans — a Building Notice is a simplified submission with no advance plan-checking, suited to smaller domestic jobs; Full Plans involves the Building Control body checking drawings before work starts, giving more certainty on larger or complex projects.
• Competent Person Schemes are trade-specific, not general — a scheme only lets you self-certify work within its defined scope (e.g. Gas Safe covers gas appliances and pipework; it does not let you self-certify a loft conversion's structural work).
• Gas Safe Register is a legal requirement, not optional, for anyone carrying out gas work — the only CPS that is compulsory rather than voluntary.
• Over 20 authorised CPS operators are listed on GOV.UK, covering electrical (Part P), gas, glazing (Part L), solid fuel and biomass (Part J), oil heating, plumbing and heating (Parts G, J, L), and other services.
• CPS self-certification includes notifying Building Control on your behalf — the scheme operator notifies the local authority so the homeowner never has to make a separate Building Control application for that specific work.
• Insurance-backed warranty — CPS self-certification for domestic customers normally comes with an insurance-backed guarantee, a TrustMark requirement, protecting the homeowner if the certifying firm later ceases trading.
• Without CPS registration, notifiable trade work still needs sign-off — either via a Building Notice/Full Plans application to LABC/an RBCA, which typically costs the customer more and takes longer than CPS self-certification.
• Completion Certificate — issued by LABC or an RBCA on satisfactory completion of Building Control-supervised work; essential documentation at property sale, alongside CPS compliance certificates for self-certified trade elements.

Quick Reference Table

Detailed Guidance

Route 1: Local Authority Building Control (LABC)

LABC is the traditional, statutory route — every local authority (district or borough council in England) maintains a Building Control team. Because their fees follow a broadly standard formula for domestic work, costs are predictable and consistent nationally, and because LABC is a statutory public body, it has legal obligations to respond within set timescales and no commercial incentive tied to winning your business.

Within LABC there are two application types. A Building Notice is the lighter-touch option — no drawings are checked in advance, the local authority is simply notified that work will start, and inspections happen reactively as the job progresses. It suits straightforward domestic jobs (a straightforward extension, a loft conversion following a standard layout) where the risk of getting the design wrong is low. Full Plans involves submitting drawings for formal checking before work starts — the Building Control body has a statutory period (typically 5 weeks, extendable to 8 by agreement) to check the plans and either approve, reject, or approve conditionally. This gives more certainty before you commit to build, which matters more on larger, structurally complex, or commercial projects.

LABC is also the only route that can issue a Regularisation Certificate — retrospective sign-off for work carried out without approval at the time. A private RBCA cannot regularise unauthorised work; only the local authority can.

Route 2: Registered Building Control Approver (RBCA)

RBCAs are the private-sector alternative to LABC, occupying the same functional space (checking and approving Building Regulations compliance for general building work) but operating commercially rather than as a statutory public service. Before the Building Safety Act 2022, this sector was known as "Approved Inspectors" (AIs) — that title and its associated regulatory framework (the Building (Approved Inspectors etc.) Regulations 2010) were replaced. All AI firms had to complete registration as RBCAs, and their individual inspectors as Registered Building Inspectors (RBIs) meeting new competency standards, by 6 April 2024 (extended to 6 July 2024 for firms with applications already in progress). A firm still trading as an "Approved Inspector" after that window is not operating legally.

RBCAs can offer more flexible booking and, for commercial and volume housebuilders, faster scheduling than an overstretched local authority team. Fees are negotiated commercially, which can make them cheaper or more expensive than LABC depending on the project. The trade-off is that an RBCA cannot issue a Regularisation Certificate — only LABC can — and RBCAs cannot take on Higher-Risk Building work, which sits exclusively with the Building Safety Regulator.

Route 3: Competent Person Schemes (self-certification)

Competent Person Schemes exist for a narrower, specific purpose: they let a tradesperson registered with an authorised scheme self-certify that a defined category of notifiable work complies with the relevant Building Regulations, without a separate Building Control application for that element. The legal basis is Section 11A of the Building Act 1984 and Regulation 20 of the Building Regulations 2010.

Crucially, CPS coverage is scoped to specific trades and specific Approved Document parts:

• Gas Safe Register — all gas work (Part J combustion, plus general gas safety); the only legally compulsory scheme, under the Gas Safety (Installation and Use) Regulations 1998.
• NICEIC / NAPIT (and other electrical schemes) — Part P notifiable electrical work: new circuits, consumer unit replacement, rewires, and additions to kitchen/bathroom circuits.
• FENSA / CERTASS — Part L energy-efficiency compliance for replacement windows, doors and roof windows.
• HETAS — Part J solid fuel and biomass appliance installation (wood burners, multi-fuel stoves, flues, hearths).
• OFTEC — oil heating and oil tank installation, plus some solid fuel and renewable heating scopes, under Part J and related requirements.
• APHC, BESCA and others — plumbing and heating self-certification covering Parts G, J and L (unvented hot water systems, sanitation, heating).

Where a tradesperson is registered with the relevant scheme, they self-certify the work directly, notify the scheme, and the scheme notifies the local authority on their behalf — the homeowner never submits a separate Building Notice or Full Plans application for that specific piece of work, and typically avoids the associated Building Control inspection fee (commonly £200–£400) for it. Self-certified domestic work also normally comes with an insurance-backed warranty, a TrustMark requirement, protecting the homeowner if the certifying business later stops trading.

The essential limitation: CPS self-certification only covers work within the scheme's defined scope. An electrician's NICEIC registration lets them self-certify the rewire; it does not let them (or anyone else) self-certify the loft conversion's new floor structure, staircase, or fire escape provisions — that remains Building Control's job, via LABC or an RBCA.

Choosing the right route for a real project

Take a typical loft conversion with an en-suite and a new gas-fed towel rail:

1. Structural work (new floor joists, staircase, roof alterations, fire escape/means of escape, insulation) → LABC or RBCA, via Building Notice or Full Plans depending on complexity.
2. New electrical circuits for lighting, sockets, and the en-suite → Part P, self-certified by a NICEIC- or NAPIT-registered electrician.
3. Gas pipework extension to the towel rail → Gas Safe, self-certified by the registered gas engineer, mandatory regardless of anything else.
4. Any replacement window or roof window in the loft → FENSA or CERTASS, self-certified by the registered installer.

Four separate certificates, potentially three or four different registered professionals, one Building Control body overseeing the structural core, and a Completion Certificate at the end confirming the whole job — including the self-certified elements — is documented and compliant. This is the normal pattern for a multi-trade domestic project, not an edge case.

What happens if the wrong route — or no route — is used

Carrying out notifiable work without any sign-off leaves the homeowner exposed: the local authority can serve an enforcement notice requiring the work to be altered or removed, and conveyancers routinely ask for compliance evidence at sale, which unauthorised work cannot produce without retrospective regularisation. Because only LABC can issue a Regularisation Certificate, unauthorised work discovered years later — even if carried out correctly — has to go through the local authority, not a private RBCA, and typically involves opening up finishes for inspection since the original stages weren't checked at the time.

Frequently Asked Questions

If my electrician is NICEIC-registered, do I still need LABC or an RBCA for the same project?

Only if the project includes work outside the electrician's Part P scope. The electrician's NICEIC registration lets them self-certify the electrical element on its own; if the wider project (an extension, a structural alteration, a new drain connection) requires Building Control, that's a separate application through LABC or an RBCA covering the non-electrical work. The two routes run in parallel, not as alternatives to each other.

Is a Building Notice cheaper than Full Plans?

Not necessarily in fee terms — LABC domestic fees are typically similar for both routes on a comparable project — but Building Notice avoids the upfront plan-checking delay, so you can start work sooner. The trade-off is less certainty: if the inspector raises a compliance issue once work is underway, you may need to alter completed work, which Full Plans' advance checking is designed to prevent on more complex jobs.

What if work was carried out years ago without any Building Control sign-off?

This needs a Regularisation Certificate, which only LABC (the local authority) can issue — a private RBCA cannot regularise historic unauthorised work. The local authority will typically require access to inspect what was done, which may mean opening up finishes if the original construction wasn't checked at the time. It's a common issue that surfaces at property sale, so addressing it proactively rather than waiting for a conveyancing query is usually cheaper and less stressful.

Can I always choose LABC over a private RBCA, or is one mandatory for certain jobs?

For most domestic work, the choice between LABC and an RBCA is yours to make freely — cost, speed, and local knowledge are the usual deciding factors. The only case where the choice is removed is Higher-Risk Buildings (residential, 7+ storeys or 18m+), which must go through the Building Safety Regulator directly and cannot use either LABC or a private RBCA — this is essentially never relevant to domestic extension, conversion, or refurbishment work.

Does a Competent Person Scheme certificate satisfy a mortgage lender or conveyancer at sale?

Yes — CPS self-certification produces a compliance certificate specifically because it's designed to substitute for a separate Building Control sign-off, and conveyancers and lenders recognise it as valid evidence for the trade work it covers. What it doesn't do is stand in for a Completion Certificate on wider structural work carried out in the same project — keep both types of paperwork (CPS certificates for self-certified trade work, and the Building Control Completion Certificate for the structural element) together as the full compliance record for the job.

Regulations & Standards

• Building Act 1984 (Section 11A) — statutory basis for Building Control and for authorising Competent Person Schemes.

• Building Regulations 2010 (Regulation 20) — the self-certification mechanism used by CPS members.

• Building Safety Act 2022 — restructured private Building Control (Approved Inspectors → Registered Building Control Approvers), created the Building Safety Regulator and the Higher-Risk Building regime.

• Building (Registered Building Control Approvers etc.) (England) Regulations 2024 (SI 2024/110, in force 6 April 2024) — RBCA registration and operational framework.

• Gas Safety (Installation and Use) Regulations 1998 — legal basis for mandatory Gas Safe registration.

• Building Regulations Part P — electrical safety in dwellings, the basis for NICEIC/NAPIT electrical self-certification.

• Building Regulations Part L — conservation of fuel and power, the basis for FENSA/CERTASS window self-certification.

• Building Regulations Part J — combustion appliances and fuel storage systems, the basis for HETAS and OFTEC self-certification.

• GOV.UK — Building Control — Building Notice, Full Plans, and choosing a Building Control body

• GOV.UK — Competent Person Schemes — authorised scheme list and scope

• Building Safety Regulator (HSE) — RBCA/RBI registration and Higher-Risk Building oversight

• LABC — Local Authority Building Control — Building Notice and Full Plans guidance, regularisation

• approved inspectors — LABC vs RBCA in depth: fees, process, and the Building Safety Act 2022 transition

• competent person — full comparison of individual Competent Person Schemes, costs and coverage

• building control — when Building Control sign-off is needed, job-by-job guidance

• building regs overview — all Approved Documents A–S and which apply to common job types

• planning vs building regs — the separate distinction between planning permission and Building Regulations

• completion certificates — what a Completion Certificate confirms and why it matters at sale